Fountain pen



March 5, 1929` G w, GlLMAN 1,704,470

FOUNTAIN PEN Filed NOV. 27, 1926 ji@ .1. i i X0 J /Z w zz im,

ffl/14 l I?? v6 77%0 i* 6607436 l//f Zwaag?? kowwey Patented Mer. 5,

parte erre nearest GEORG-E WASHINGTON G-L'MAN, OF JANESVILLE, WISCONSIN, ASSGNGR T0 CORONA PEN COMPANY, INC., 0F .ANEsvlLLE, WISCONSIN, A CORPORATION 0F WISCONSIN.

FOUNTAIN SEEN.

Application led November 27, 1926.` Serial No. 151,104.

The present invention relates to fountain pens, and more particularly to pens of the self-filling variety, provided with ink bags and compressing means for the same.

The purpose of compressing the ink bag isv to drive out the air therefrom. This permits a new supply of ink to be sucked into the bag when it is returned to its normal shape. The compressing means usually comprises a leaf spring that is longitudinally disposed within the barrel and that is movable transversely thereof inl one direction to compress the bag andin the opposite direction to release it. One end of the spring is usually actuated by a cam at one'end of the barrel and thelother end of the spring engages against a section that carries the pen point. The continual operation of the spring has a tendency to force the pen point section out of the barrel. i

t is accordingly an object of the presentinvention to improve upon present-day pens of the above-described character, tothe end that their construction may be rendered more simple and in order to do away with the tendency in the above-described pens to force the pen-point section out of the barrel.

Vf ith .this object in view the invention consists of the fountain pen aI preferred embodiment of which is hereinafter described, illus trated in the accompanying drawings anddcfined in they appended claims.

Y In the drawings, Fig. 1 is an elevation of a pen constructed according to a preferred embodiment of the present invention; Fig.`2 is a longitudinal section, upon an enlarged scale; Fig. 3 is a section of a portion of the mechanism shown in Fig. 2, but with parts' omitted for cleainess; Fig. 4 is a section taken upon the line 4-4 of Fig. 2, looking in the direction of the arrows; Fig. 5v is a section similar to Fig. 4, of a modification; and Fig. 6 is a section taken upon the line 66 of Fig. 5, looking in the direction of the arrows.

The fountain pen of the present invention is shown provided with a barrel 2 Lhaving an interior side face 4 and an end face 6 provided with an opening 8,'the diameter of which i s` smaller than the diameter of the interior face 4. An ink bag 10 is positioned inthe barrel,

fastened at its open end to a. section 12 that carries the pen 20. The ink b ag is adapted to be compresse-d and released by aspring.

According to the present invention, the spring is reversely bent at 13 to provide two arms 14 and 16. The arm 16 is shorter than the arm 14.,` The longer arm 14 extends i through the open end 8 of the barrelr and is provided with'a bent-overV portion 17 adapted to be engaged, as will presently be described7 so as to exert a pull upon the end 17, thereby -causing the arm 16 to be bowed out, as shown in'Fig.' 2, intothe bag to compress it.

The opening 8 is shownnthreaded in Fig. 2 to receive the threads 24 0fV an externally threaded sleeve 26. rlhe sleeve is provided with an annular shoulder28 that engages the interior face of the end face 6,4thereby to limit further movement of the sleeve 26; The sleeve 26 is provided with a recess 30 in which is received a bent end 32 upon the arm 16. When the spring arm 14is pulled, as before described, therefore, the recess 30 acts stop engaged by the end 32. of the spring armA 16 forcing the arm 16 to be bowed out,`v as before described. y Y

An internally threaded sleeve 34 is threadedupon the threads`24 of thesleeve 26 and its outer face 36 engages the end 17v of the spring arm 14 to pull against the spring; yas before described7 when the sleeve 34 is 'threaded along the threads 24. When the' sleeve 34 threaded inone direction, the spring is pulled to cause the bag to becoinecompressed. When the sleeve 34 is'threaded in the opposite direc- 85 tionthe energy storedup` in the spring arm 14V causes the spring toY become straightened out once more into, the fulllline position of Fig. 2; During the movement of the end of v the spring arm 14 in this manner, itis guided 90 in a slot 38 cut longitudinally in the sleeve 26. A'screw 40 is threaded into internal `threads 42 ofthe sleeve 26 to limit the movement of the sleeve 34. A cover 43 is secured in any desired way to the exterior face ofthe sleeve 95 34 so as to rotate therewith. The rotation o-f the cover 43 will, therefore,'eifect the rotation of the sleeve 34 and the actuation of the spring. kThe closure that'is thus produced may be caused to seal the barrel ink-tight by' loo providing the sleeve 34 with a sharp annular flange 44.

For clearness, the threads 24 are shown somewhat line, but it will be understood that in prac-tice they will be coarse enough so that one turn of the closure will serve to cause the spring to become bowed into the bag, ,and one turn in the opposite direction will return the yspring to normal position. l .n

According to the invention shown in Figs. 5 and 6, the sleeve 26 may be fixed in the barrel as before described, or in any other desired way, but the sleeve 34 is not caused to thread up and downen the sleeve 26, but is rotatable without moving up and down on the sleeve, and is provided with cam 45 for engaging a cooperating cam member 46 upon the end of the spring arm 14. The cam member 46 thus replaces the bent end 17 shown in Fig. 2. In other respects the operation is as above described. This modification is preferred because it provides a more rapid movement of the spring into and out of the bag.

In both modifications, it will be understood, the spring arm 16 ma be provided with an intermediately secure stifl' strip or pad for engaging the bag to compress it. Other modifications will readily occur to persons sl-:ill'ed in the art, and all such are considered to fall within the spirit and scope of the invention as defined in the appended-claims.

What is claimed is: 1. A fountain pen having, in combination, a barrel having an end face and a stop, an ink bag in the barrel, a reversely bent, twoarmed spring in the barrel for compressing the ink bag, one of the arms being adapted to engage the stop, and means for actuating the other arm to cause the said one arm to engage the stop and to become bowed out into the bag to compress the bag. p

2. A fountain pen having, in combination, a barrel having an end face and a stop, an ink bag in the barrel, a reversely bent, twoarmed spring in the barrel `for compressing the inl; bag, one of thearms ofthe spring being longer than ,the other and extending through the end face, the said other arm of the spring being adapted to engage the stop, and means for pulling the extending end of the longer arm to cause the shorter arm to engage the stop and the spring to become Vbowed out into the bag to compress the bag. Y3. Afountain pen having, in combination,

a barrel having interior side and end faces and having a recess, an ink bag in the barrel, a reversely bent, two-armed spring in the barrel for compressing the bag, one of the arms of the spring being longer than the other and extending through one end face, the said other arm of the spring having'a portion extending into the recess, and means for pulling the extending end ofthe longer arm to cause the spring to become bowed out into the bag to compress vthe bag.

into the recess, and means carried by the seci tion for pulling the extending end of the longer arm to cause the spring to become bowed out into the bag to compress the bag.

5. A fountain pen having, in combination, a barrel having interior side and end faces and having a recess near an end face, an ink bag in the barrel, a reversely bent, two-armed spring in the barrel for compressing the bag, one of the arms of the spring being longer than the other and extending through the said end face and having a bent-over portion, the said other arm of the spring having a bentover portion extending into the recess, and means engaging the first-named bent-over portion to pull the extending-end of the longer arm to cause the spring to become bowed out into the bag to vcompress the bag.

6. A fountain pen having, in combination; a barrel; a threaded member carried by the end of the barrel; a closure member threaded on the end of the threaded member and adapt-r ed to be screwed inwardly and outwardly, said closure member adapted to seal the barrel when screwed in an ink bag in the barrel; and means for compressing the ink bag, said means adapted to be actuated by outward screwing of the closure member and released by inward screwing of said closure member` 7 vA fountain pen having, in combination, a barrel having an end face and a stop, an ink bag in the barrel, va reversely bent, twoarmed spring in the barrel for compressing the inl; bag, one of the arms being adapted to engage the stop, a bag-compressing strip secured to the said oneiarm,'and means for actuating the other arm to cause the said one arm to engage the stop and to cause the strip' to become pressed into the bag to compress the bag.

8. A fountain pen having, in combination, a barrel having an end face and a stop, an ink bag, inthe barrel, a reversely bent, twoarmed spring in the barrel for compressing the ink bag, the arms being of different length, one of the arms being adapted to engage the stop, and means for actuating the other arm to cause the said one arm to rengage the stop and the spring to become bowed out into the bag to compress the bag.

In testimony whereof, I have hereunto subscribed my name.

GEORGE VASHINGTON GILMAN. 

